Izikhephe zodongwe ezinobushushu obuphezulu zisetyenziswa ngokubanzi kwiilebhu zemigodi, iSityalo seMetallurgical, kunye nezinye iindawo zohlalutyo lwesampulu yesinyithi. Ukhetho lwethu lokuvavanya umlilo olukumgangatho ophezulu we-alumina bauxite, i-mullite, i-kaolin njengemathiriyeli ekrwada enefom yesayensi kunye nobuchwepheshe obuphambili. Umxholo ophantsi kakhulu wezinto zegolide nezesilivere unokwenza iziphumo zovavanyo zichaneke ngakumbi.